:root { color-scheme: light; --ink: #202632; --muted: #657084; --accent: #215c9e; --line: #e3e8ef; }
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: #fff; font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
main { max-width: 1040px; width: calc(100% - 40px); margin: 40px auto 28px; }
header { text-align: center; margin-bottom: 30px; }
.project { color: var(--accent); font-size: 21px; font-weight: 750; text-decoration: none; }
h1 { font-size: clamp(26px, 4vw, 36px); letter-spacing: -.03em; line-height: 1.25; margin: 8px 0 10px; }
.intro { color: var(--muted); margin: 0; }
.demo { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.demo-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 24px; border-bottom: 1px solid var(--line); }
h2 { margin: 0; font-size: 21px; letter-spacing: -.02em; }
#rate { margin: 3px 0 0; color: var(--muted); font-size: 14px; }
button { font: inherit; font-size: 14px; cursor: pointer; border: 1px solid var(--line); border-radius: 7px; padding: 8px 12px; background: white; color: var(--ink); white-space: nowrap; }
button:hover { background: #f1f5fa; }
button[aria-pressed="true"] { background: var(--accent); color: white; border-color: var(--accent); }
button:disabled { opacity: .45; cursor: default; }
.modes { display: flex; gap: 7px; }
.comparison-modes { justify-content: center; flex-wrap: wrap; padding: 14px 12px; }
.resolution { color: var(--muted); font-size: 13px; }
.resolution select { font: inherit; padding: 7px; border: 1px solid var(--line); border-radius: 7px; background: white; color: var(--ink); }
.stage { position: relative; width: min(100%, 620px); margin: auto; aspect-ratio: 1; overflow: hidden; cursor: grab; touch-action: none; user-select: none; }
.stage.dragging { cursor: grabbing; }
.stage img { display: block; width: 100%; height: 100%; object-fit: contain; pointer-events: none; transform-origin: center; }
.zoom-tools { position: absolute; top: 15px; right: 16px; display: flex; align-items: center; gap: 5px; padding: 3px; background: #ffffffed; border-radius: 8px; cursor: default; }
.zoom-tools button { width: 32px; height: 32px; padding: 0; font-size: 20px; }
.zoom-tools output { min-width: 38px; text-align: center; }
.mode-label { position: absolute; top: 15px; left: 20px; font-size: 13px; color: var(--muted); background: #ffffffd9; padding: 3px 8px; border-radius: 4px; }
.drag-hint { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); white-space: nowrap; font-size: 13px; color: var(--muted); background: #f3f6f9eb; border-radius: 20px; padding: 6px 14px; pointer-events: none; }
.controls { display: flex; align-items: center; gap: 16px; padding: 16px 24px 4px; border-top: 1px solid var(--line); }
input[type="range"] { flex: 1; min-width: 45px; accent-color: var(--accent); cursor: pointer; }
output { min-width: 38px; color: var(--muted); font-size: 14px; text-align: right; font-variant-numeric: tabular-nums; }
.status { min-height: 20px; color: var(--muted); font-size: 12px; margin: 8px 24px 13px; }
.note { color: var(--muted); text-align: center; font-size: 13px; margin: 18px auto; max-width: 900px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.comparison-page main { max-width: 1280px; }
.embedded main { width: 100%; margin: 0; }
.embedded header { display: none; }
.embedded .note { margin: 12px 16px; }
.view-options { display: flex; align-items: center; gap: 14px; }
.view-options { flex-wrap: wrap; justify-content: flex-end; }
.detail-context { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 8px 16px; font-size: 13px; color: var(--muted); }
.detail-context[hidden], #detail-control[hidden] { display: none; }
.detail-map { position: relative; flex: 0 0 100px; height: 100px; }
.detail-map img { width: 100%; height: 100%; display: block; }
#detail-box { position: absolute; border: 2px solid var(--accent); }
.panels { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.comparison-panel { min-width: 0; }
.comparison-panel + .comparison-panel { border-left: 1px solid var(--line); }
.panel-heading { text-align: center; padding: 12px 8px 4px; }
.panel-heading label { font-size: 13px; color: var(--muted); }
.panel-heading select { font: inherit; font-size: 15px; font-weight: 600; color: var(--ink); border: 1px solid var(--line); border-radius: 7px; background: white; padding: 6px; max-width: 90%; }
.panel-heading p { margin: 5px 0 0; color: var(--muted); font-size: 12px; min-height: 20px; }
.panel-heading .quality { color: var(--ink); font-variant-numeric: tabular-nums; }
/* Keep the two images aligned even when GT has no quality score. */
.panel-heading .quality[hidden] { display: block; visibility: hidden; }
.panels.single { grid-template-columns: minmax(0, 1fr); }
.panels.single .comparison-panel { border-left: 0; }
.comparison-panel[hidden] { display: none; }
.panels.single .stage { max-width: 800px; width: 100%; }
.paired-controls { display: flex; align-items: center; gap: 12px; border-top: 1px solid var(--line); padding: 14px 24px 4px; }
.zoom-buttons { display: flex; align-items: center; gap: 4px; }
.zoom-buttons button { padding: 6px 10px; }
.zoom-buttons output { text-align: center; }
.paired-hint { text-align: center; font-size: 13px; color: var(--muted); margin: 10px 8px 0; }
.comparison-page .status { text-align: center; }
@media (max-width: 700px) {
  .comparison-page .demo-heading { flex-wrap: wrap; padding: 12px; gap: 8px; }
  .view-options { gap: 8px; flex-wrap: wrap; }
  .paired-controls { flex-wrap: wrap; gap: 8px; padding: 12px 10px 4px; }
  .paired-controls input { min-width: 80px; }
  .panel-heading select { font-size: 13px; }
}
@media (max-width: 600px) {
  main { width: calc(100% - 24px); margin-top: 22px; }
  header { margin-bottom: 22px; }
  .demo-heading { padding: 15px; align-items: flex-start; flex-direction: column; gap: 12px; }
  .controls { padding: 13px 12px 4px; gap: 8px; }
  button { font-size: 13px; padding: 7px 9px; }
  .status { margin-left: 13px; margin-right: 13px; }
  .note br { display: none; }
}